150th Anniversary Edition.
This is a vast treasure-house of words and phrases arranged according to ideas and meaning. Over 250,000 words, phrases and expressions, ranging from the literary to slang, from the technical to the philosophical, from the traditional to the new.
Avoiding repetition, improving quality of expression, finding clearer words to replace obscure or hackneyed expressions, changing formal words to colloquial ones, recalling words and expressions which have slipped your mind.
Roget's Thesaurus has sold over 32 million copies since the original edition was published in 1852. It has become the indispensable desk companion for generations of English speakers and writers and is firmly established as the authoritative reference work for improving command, creative usage and enjoyment of English.